Sum
If a shop is open from 9:30 am to 10 pm, how long is it open?
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Solution
Here, 10 pm in 24 hours clock is 22:00
9.30 am in 24 hours clock is 09:30
| Hours | Minutes | |
| 2 2 | 0 0 | Shop closes |
| - 9 | 3 0 | Shop opens |
| 1 2 | 3 0 |
∴ The shop opens for 12 hours 30 minutes.
Concept: Examples of Time Measurement
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